Needle-latch-riveting machine



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Feb. w, H924.; A J.' A. CAF-DER ET AL NEEDLE LATCH RIVETING MACHINE Filed Dec. 6, 1918 5 Sheets-Sheet 1 NNW. Y

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.f1-En 19. 1924.` www@ 4 I J. A. CALDER NEEDLE LATCH RIvETmG MAdHINE Filed nec. s, 1913'v s sheets-sheet 2 Feb. 19, 1924. 11,484,476'

i J. A. CALDER ET A.

NEEDLE LATCH RIVETING MACHINE Filed Dec. 6, 1918 5 Sheets-Sheet 5 thro/magg Feb. 19, 1924;-

J. A. CALJDER ET AL. NEEDLE LATCH RIVETING MACHINE Fired Deo. e, 1918 5 Sheets-Sheet 4 l Witwen Feb.. 19, 1924.` LMIMW@ J. A. CALDE@ ET AL,

NEEDLE LATCH RIVETING MACHINE Filed Dec. 6, 1918 5 Sheets-Sheet 5 j' cb'. A9.

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Patented Febe 19, i924.

MTED STATES @FFlCEO JOHN A. GALDER, OF TORRINGTON, AND WILLAEE H. DAYTON, DCEASED, LATE OF TORRINGTON, CONNECT-CUT; BY JAMES Tv. DAYTON, ADMINISTRATOR, T? SFRNG- FIELD, MASSACHUSETTS, ASSGNORS T0 THE TORRINGTON COMPANY, GF TORRING- TON, CGNNECTICUT, A. CORPORATION 0F CONNCTICUT.

NEEDLE-LATCH-RIVETING vAGHNE.

Application led. December 6, 1913. Serial No. 265,541.

To all whom t may concern.'

Beit known that we, JOHN A. CALDER, a citizen of the United States, residing at Torrington, Litcheld County, Connecticut, and

s JAMES M. Darrow, oi' Springfield, Massachusetts, administrator of the estate of WIL- LrAM H. DAYTON, deceased, also a citizen o the United States, and late a resident of Torrington,` Litchfield County, Connecticut, ie have invented certain new and useful lmprovements in Needle-Latch-Riveting Machines, of which the following is a description, reference being had to the accompanying drawings, and to the figures of reference i marked thereon.

The'invention relates to new and useful improvements in needle latch riveting machines, and more particularly to the mecha.- nisrn for operating the riveting members.

An object ofthe invention is to provide a riveting machine ofthe above character, wherein the riveting members are given rapidly a series of movements for upsetting or balling the rivet, and wherein the movees ments of the riveting members are suspended substantially during the time of the withdrawingV and inserting of another needle for the riveting of the latch therein.

A 'further object of the invention is to provide a riveting machine wherein the rivet is upset at one station and the heads of the rivet are balled and sea-ted in recesses in the side faces of the needle at another station.

These and other objectswill in part be obvious and will in partfbe more fully disclosed.

In the drawings which-show by way of illustration one embodiment Vof the invention- Figure 1 is a view showing more or less diagrammatically, a latch needle having a latchin place and the wire inserted from which the rivet is to be formed;

Figure V2 is asimilar view, but showing f the completed rivet having the center thereof enlarged to form a bearing support Vfor the latch and the heads of the rivets balled and seated in the recesses in the side faces of the needle;

Figure 3 is a view partly in section and partly in side elevation, showing one of the riveting devices;

Figure f1 is a perspective View of the riveting members and the immediate parts for supporting and operating the saine;

Figure 5 is an enlarged detail, showing the adjustable pivot support :tor one oi the riveting members;

Figure 6 is a view partly in section and iartly in side elevation of the riveting memers and showing particularly the manner of mounting the riveting hammers in the operating members therefor;

Figure 7 is an end view or the riveting members;

. Figure 8 is a sectional view on the line S-8 of Figure 6;

Figure 9 is a sectional View on the line 9 9 oFigure 6;

Figure 10 is a side view or" the controlling bar which causes the riveting devices to be effective or ineii'ective;

Figure 11 is a similar view at right angies to that shown in Figure 10;

Figure 12 is a side view of the rotating head which car-ries the controlling means :cor the riveting devices;

Figure 13E is a view at right angles to that shown in Figure 12;

Figure 14 is an end view of the rotating head; Y

Figure 15 is a side view of the shittable crank pin for operating the riveting devices;

Figure 16 is a top plan view of the same;

Figure 1'? is a perspective view of the supporting and guiding posts i'or positioning the needle relative lto the riveting devices;

Figure 18 is a view partly in plan and partly in section ot the same;

Figure 19 is a view showing more or less diagrammatically, the two associated riveting devices, one 'for upsetting and the other for Vheading the rivet and the means tor presenting the needle iirst to one riveting device and thenl to the other:

Figure 2O is an enlarged view partly in section and showing the operation ot the.

upsetting devices Figure` 21 is a similar view, but showing the operation of the rivet balling devices.

The invention consists broadly 1n a riveting mechanism having two riveting devices v or .heading of the rivet.

or hammers which are adapted to simultaneously impart blows to the rivet for upsetting and for heading the rivet. This riveting'mechanism is controlled by certain devices, so that the riveting hammers are set into operation and caused to impart a series of blows to the rivet, after which the movement of the riveting hammers is caused to cease and the parts are so timed that the riveting hammers are inaction only substantially during the time of the upsetting This enables the riveting4 hammers to be very nicely adjusted and avoids all strain on the riveting hammers incident to the constant vibration of thesame when there is no rivet in place'to be operated upon. Means is also provided for adjusting the riveting members relative to each other, so thatthey may bebrought into proper alinement and proper working position Vrelative to each other in order to accomplish'thedesired result either in the upsetting or lheadingot the rivet.

.In the .riveting of a latch needle, it is desirable to bring about the upsetting of the rivet at one operation, or at one station, and the heading of the rivet at another station. Tothis end, two riveting mechanisms of a similar character `are provided, one of which has lriveting hammers, which are constructed and controlled so as-to upset the rivet causing the central part of the rivet to bulge or enlarge, and the other set of riveting hammers are so constructed and operated as toinish the enlargement of the center of the rivet and to ball the heads of the rivet, seating-the same 'well beneath 'the outer surfaces'ofthe needle in recesses provided for the same. Automatic means is provided .for presentingthe needle iirst to one riveting mechanism and then the other.

The im roved riveting machine and the manner o operating the same will be made clear by a detail reference to the drawings. In the Figures 1 and 2, there is shown a needle N, which is of the latch needle type, and inserted in the needle is va latch L. Along side of the latch is apaper shim, indicated at p. .In Figure 1, the stock from which .the lrivet isformed is indicated at 11 and this stock is `cut at theright length to form the rivet. It will be noted that the side walls of the fneedle are formed with recesses and, as clearly shown in Figure 2, in the linal heading of the rivet, the ends thereof are balled and the edges of the ballshaped head are carried well into the respective recesses.

:The riveting machine includes a suitable supporting frame 3, on whichv is mounted an endless carrier 4C, provided with a series of chucks 5-5. These chucks are mounted on the endless carrier, so that they may be moved transversely thereof, and each chuck is provided with a suitable clamping means for clamping the needle. A controlling bar 6 serves as a means for moving the chucks forward to kpresent the needles to the riveting station. The endless carrier moves in the direction of thearrow, indicated in Figure 19, and has a step by step movement in order to bring the chucks first to one riveting station and then the other. The upsetting riveting station is indicate at A,

in this ligure of the drawings, and the heading station is indicated at B. The riveting mechanisms at the two stations are exactly the same except forthe construction ofthe head Vof the riveting hammers, and, therefore, only yone ot the riveting mechanisms has been illustrated and will be described in detail.

As the chuck movesforward at the riveting station, it brings the needle with the latch inserted and the rivet material in placeinto proper position relative'to a supporting post 287, see Figures 17 and 18.

Said supporting'post is secured to the frame 3.0i the machine'and is provided with an adjustable arm 288, which is secured tothe post by screws 289. This `arm has an inclined ledge 290 and a vertical shoulder, which is also inclined, as indicated at 291. The purpose of these inclined parts is to direct the point'ofthe needle so as to properly position the needlewith therivet therein for the riveting hammers to strike the same. Also, carried by the supporting post 287 are guide plates 292 and 293. The adjacent edges of-these guidefplatesare slotted soas to form -a recess 294 -orfthe point of the needle .to enter. These guide @pla-tes are pivoted tothe post 287 `and are heldon their pivots by an overlapping'arm 295. A spring 296 holds Athe plates together. lThe recess 294 is tapered, as clearlyindicated indotted lines in `Figure 18,fand1this enables-the needle point to enter between'the `guideplates which centers the `needle for the riveting operation. The above structure is shown in an organized machine and described more in detail in the Apatent-granted William H. Dayton, Novemberlll, 1921, No. 1,381,810.V

Thef riveting hammer 297 is carried Yby a lever 299, which is pivoted at-300 toa .supporting block-301, carried by the frame 3. The riveting hammer 298is carried by a lever 302, which is pivoted at 303to theblock 301. The pivot 303 is formed withan eccentric section304 around which the leverl 302 swings. By adjust-ing the1pivot303, the fulcrum point of the lever 302 maybe shifted and ythiswill change the workingfposition ot the hammer 298.

The lever 299`is provided with a pivotally mounted head 333, in which the hammer 297 is clamped by the screws 338. A clamping plate 337 holds the hammer and the screws passing through this clamping plate cause the same to grip the hammer and firmly hold the same, see Figure 9V of the drawings. This head 333 is mounted 4to swing about a' pivot pointV 334. Extending laterally from thelever 299 are shoulders 336. Threaded into the head 333 are screws 335, which are adapted to bear respectively against the shoulders 336. It will readily be seen that, by loosening one of the screws 335 and tightening the other, the pivot head 333 may be swung to the right or left about the pivotl point 334. This provides for a lateral adjustment of the upper riveting hammer 297 and enables the riveting hammers to be quickly brought into proper alinement. A screw 306 is threaded into the upper end of the head and serves as an abutment for the hammer 297. By loosening the screws 338, and turning the screw 306, the vertical position of the upper hammer may be readily adjusted and then the screws 338 turned-in to hold the hammer in an adjusted position. l Tha lower hammer 298 is clamped to the lever 302 byy a clamping screw 307. The'end of the lever is split and the clamping screw draws the split ends together, thus iirmly clamping the lower hammer. This lower hammer rests against an adjustable abutment 308, which provides the means tor vertically adjusting the lower hammer. As above noted, the position of the lower lever 302 canfalso be adjusted by shifting the fulcrum thereof.

The levers 299 and 302 are moved toward and from each other by a barv309, which slides lin the block 301. This bar is formed with a head 310. A link 311 is pivoted at its lower'end to this head and at its upper end to the lever'299. A link 312 is pivoted at its upper end to this head and at its lower end to the lever 302. These Vlinks are Yset so as to move from alinement to a position at angles to a line passing through their pivotal connections with the head, so that, as the bar 309 reciprocates, the levers 299 and 302 will be rapidly moved toward and from each other. Buiier springs 313 may be used in connection with the levers carrying the hammers. The bar 309 is reciprocated by means of a link 314. This link is connected to a crank'pin 315, rigidly carriedl by a block 316. The block 316 is mounted to slide radially on a rotating sleeve or shaft 317, carrying a head 318, formed with a slot 319 to receive this block 316. The sleeve 317 carries a beveled gear 320, which meshes with a beveledV gear 321 ona short shaft carrying a beltwheel 322. This belt` wheel Yis driven by a belt 323, which may be operated roman overhead shaft.y The sleeve 317 is journaled so as to rotate in a suitable bracket 324. EX- tending centrally through this sleeve is a rod 325, which has an inclined end 326, adapted to engage a similar shaped recess 327 formed in the block 316. This rod 325 is capable of endwise movement in the sleeve and is moved by a rock lever 328 which is pivoted at 329 to a bracket arm 330. This rock lever carries a roller 331, which engages a cam 332, mounted on the shaft 8a. The crank pin 315 is positioned on the block 316 and when the rod is in the position shown in Figure 3, this crank pin is concentric with the axis-of the rotating sleeve and as a consequence, no movement will be imparted to the link 314 or to the riveting hammers. If, however, the rod 325 be raised, the linclined end 326 thereof will force the block 316 radially of the sleeve, so as to set the crank pin olf center and this results at once in an endwise vibration of the link 314, which in turn moves the bar 309 back and forth endwise and this will rapidly vibrate the hammers s0 as to bring about the upsetting of the rivet, which, of course, is placed directly between the hammers. By this means the riveting hammers may be controlled so as to be actuated only when there is a rivet between the same, thus greatly reducing the wear ofthe riveting hammers and maintaining a proper throw to bring about just the desired amount of upsetting of the rivet. Cooperating with the crank pin 315 is a rotatable table 315a which aiiords a means for holding the link on the crank and permitting the adjustment of the crank to eccentric position. By shifting the pivot pin 303, the fulcrum point of the lever 302 may be varied so as to vary the working position of the hammer carried by said lever 302.

ln Figure 20, there is shown the eiiect of the `upsetting of the riveting mechanism. The riveting hammers are provided with fiat heads and these riveting hammers first operate to center the rivet so that it projects an equal distance above and below the needle and then it causes a bulge of the rivet at the center thereof and a slight enlargement or upsetting of the head. After,

the rivet has been operated upon 'in the manner above stated, so as to bring about an upsetting of the rivet, then the chuck moves to the next riveting station where the riveting hammersare shaped s0 as to ball the ends of the rivet.

In Figure 21 of the drawings, the riveting hammers are shown as having recesses in their faces and these hammers are shaped so as Vto round or ball the head of the rivet andseat the balled heads in the recesses in the sides of the needles. The chuck pre sents the needle with the rivet therein .first to the upsetting station where the rivet is upset. After this operation is completed, the chuck withdraws the needle, the carriermoves forward and then the chuck presents the needle to the next `riveting station. The cam which controlsthe effective operation of the lriveting members is so shaped as to cause the riveting `hammers to operate only when the rivet is between the hammers and when the riveting hammers would become effective for upsetting or balling the rivet. During the time when the needle is being retracted and presentedto t-he `next station, the riveting mechanism is rendered ineffective by means above .described. lOf course, it is understood that the needles are presented one after another in succession, to first one riveting mechanism and then the other.

`From the above, it will be apparent `that a rivetingmachine is provided whereinthe rivet is upset at one ,station and balled or headed atanother station, and these riveting mechanisms at each .station are so operated as to be ineffective during the time when the needle is being conveyed `from one station to another. Furthermore, .the riveting mechanisms are so constructedthat the working position of the riveting members may be rapidly adjusted and the position of the hammers on the operating levers may also be quickly adjusted so as to bring the same into proper alinement and also into Y proper working relation .to each other.

It is 'obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention, as set forth in the appended claims.

Having thus described the invention what is claimed as new anddesired to secure by Letters Patent, is:

1. A riveting machine including in combination, riveting hammers, an operating lever for each hammer, means for rapidly vibrating said levers and for automatically suspending the vibrations thereof so as to facilitate the yplacing of the rivetFbetween the hammers.

2. A riveting :mechanism including in combination, riveting hammers, anoperating lever for each hammer, a reciprocating head, a .link for connecting each lever `to said head, said links being disposed so as j to move toward and from alinem-ent for operating the levers, one of said levers being mounted on an eccentric support and ada-pted to be shifted for bringing the rivet and hammers into proper alinement.

3. A riveting mechanism including in combinatiomriveting hammers. `an operatinglever for eachhammer, alink for connecting each lever to said head, saidz links being disposed so as tomovetowardf-,and from -alinement'for operating the` levers, and

means Afor reciprocating said Vhead including devices V,whereby the .reciprocations of the head may be suspended periodicallyto per-r mit the insertion and removal of the work between the riveting hammers.

4. A .riveting mechanism including in combination, riveting hammers, a pivoted lever foreach hammer, a head movable between said levers, a link connecting each lever with said head, said links beingl disposed-sofas to move toward and from aline ment for positively reciprocatingthe levers, and buffer springs for cushioning the levers on their movement toward each other.

5. A riveting mechanism including in combination, riveting hammers, a pivoted lever for each hammer, a reciprocating memberlocated between the said levers, a link pivotally connecting each lever to said reciprocating member, said links being so disposed as tomove toward and from alinement for reciprocating the levers, ymeans for reciprocating said member including devices fer automatically suspending said reciprocations periodically to aid in the insertion and removal of the work. Y 6. A riveting mechanism including in combination, riveting hammers, ak pivoted lever `for each hammer, 'a reciprocating head between :the levers, a link connecting said reciprocating head with each lever, said links being disposed so ias to move toward and :from alinement for reciprocating said levers, a rotating shaft, a crank :carried thereby and connected to said head forreciprocating the sameymeans for shifting the crank from` a lposition in line with the axis of the shaft to a position eccentric thereto, `whereby the riveting members are rendered effective or ineffective. Y

'i'.V A riveting mechanism including in combination, riveting hammers, a pivoted leverfor each hammer, a reciprocating head between ,the levers, a link connecting said reciprocating head with each lever, said links being disposed soas to'move toward and 'from alinement lfor reciprocating .said levers, a rotating shaft, a crank carried thereby and connected to said head for-reciprocating the same, arod sliding vertically of the shaft and connected to said crank for shifting the same radially of the shaft, and a rotating cam for shifting said rod whereby the riveting hammers are'automatically suspended periodically to facilitate theinsertion and removal of the work.

8. A riveting machine `including in. combination, riveting hammers, an operating lever forone of said hammers, a pivoted head mountedon the leverrand supporting the hammer, means for clamping the hammer tothe head, meansfor shifting the pivoted head andclamping the same in position, and an adjustable abutment carried by the i head fori-.said hammer.

9. A. riveting machine including in combination, riveting members, a reciprocating member for operating said riveting members, a rotating shaft, a crank adjustable radially of the rotating shaft, a rod extending lengthwise of the shaft and having a cam end for moving the crank from the position in line with the axis of the shaft to a position eccentric thereto, means for rotating the same, and means for re- 1o ciprocating the rod.

1n testimony whereof, We aiiX our signatures. Y

JOHN A. CALDER. JAMES M. DAYTGN, Administrator of the Estate of William H.

Dayton, Deceased. 

